Figure 5. Distribution of motor unit fatigue index in normal and reinnervated muscles.

Frequency histograms of motor unit fatigue index sampled from normal (A), partially denervated (B) and reinnervated muscles after nerve crush (C), N-N (D) or N-M sutures (E). The distribution of fatigue index values is bimodally distributed in normal, partially denervated and reinnervated muscles after nerve crush, but is less discretely divided into 2 modes in muscles reinnervated by completely transected nerves (i.e. N-N and N-M sutures). Mean fatigue index is indicated by a vertical line.